Can you make a link shortener with just a DNS? Not quite.
A short educational project to:
familiarize myself with CloudFormation
have an excuse to buy a new domain name (invisi.link)
satisfy my curiosity about a pure DNS link shortener
(the TL;DR is "no" -- you can't put protocols and paths in a DNS entry so
the DNS entries alone aren't enough... but my concession was to use
Route53 + S3 so the shortened links are all stored as DNS records.)